https://mycotopia.net/forums/fungi-all-edible-medicinal-other-mushrooms/37343-foafs-oysters-pine-needles.html
"… Lately he tried an experiment that went very well. He used white pine needles that he had collected. He soaked these needles and pasturized them and went ahead and spawned them. I believe that at least one of the pics you see is pine needles mixed with straw and the others straight needles.
He has told me that the striaght needle bags fruited faster and heavier than the straight straw or the needle/straw mixture. This is quite exciting because straw is hard to get here in the off season, but the forest floor is literally littered with pine needles."